Means for regulating the eyepieces of stereoscopes.



.I. RICHARD.

MEANS FOR REGULATING THE EYEPIECES 0F STEREOSCOPES.

APPLICATION FILED DEC- 2. I912.

Patented Apr. 3,1917.

FFT- ll -11:

JULES RICHARD, OF PARIS, FCE;

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cal axes to the interval corresponding to the interval between the eyes of the user: (2) they can be focused in accordance with the eyesight of the person who is looking at such views.

The apparatus hitherto constructed have already been provided with mechanism enabling these two movements of the eyepieces to be obtained, but the arrangements have been such that the eyepieces were badly fixed, the adjusting sleeves supporting the said eyepieces being capable of play in every direction. The focusing carriage integral with the rack was mounted upon the wood of the box of the apparatus and the fitting was wanting in precision. It necessitated considerable play in the rings through which the focusingsleeves pass.

Thenagain, with this arrangement it was not possible to bring the eyes very close to the eyepieces as is necessary for certain persons, because the nose encountered the eyepiece fitting.

Now this invention has for. its object a device for adjusting the eyepieces of stereoscopes, in which these defects are avoided.

This device is characterized by the fact I that each-eyepiece is carried by a plate which slideson the one hand on a rod integral-with the focusing carriage, and on the other hand I upon a branch presented by a plate also integral with "this carriage this plate being stamped or formed in such a manner as to enable the nose to be brought between the eyepieces and as close to these eyepieces as desired.

Furthermore, the entire mechanism is.

mounted upon a metal plate which fits the front of thebox containing the stereoscopic V, apparatus. r

' The'i nvention is illustrated, :but by way Specification of Letters Patent.

Patented Apr. a, ter t.

Application filed December 2, 1912. Serial No. 734,557.

of example only, in the accompanying drawing, in which Figure 1 is a'front elevation of the novel device.

Fig. 2"is a similar view, the eyepieces being separated one from the other.

Fig. 3 is a plan view corresponding to Fig. 2. p

Fig. 4: is a side elevation corresponding to this same figure.

As shown in the drawing, the eyepieces a are integral with plates b formed from a stamped sheet of metal.

-This plate is provided with lugs 0 turned till down laterally and perforated with an eyelet so that they can be en aged upon a rod d integral with the focusi g carriage.

Each of the plates is also provided with a claw e engaged in a branch f stamped in aplate g. The latter also forms part of the focusing carriage as shown in Figs. 1 and 2, and 1s cut at g, at its lower part, with a contour corresponding to the form of the nose.

In addition to the plate 9 and the rod d, the focusing carriage comprises a part it which forms a rack. This rack meshes with a pinion 5 controlled by amilled knob y. The whole is mounted upon a supporting plate which also receives the slides for varying the interval.

With this object the focusing sleeves k for the eyepieces are engaged in circular openings presented by two slides l, movable in slideways m. These sleeves 7c are guided laterally by rings 1'"'rigidly fixed upon these slides Z.. The slideways m are fixed upon a metal base '9 which is screwed onto the shutter forming the front of the boxes containing the stereoscopic apparatus.

The slides can be separated or brought together by means of two rods n 0' and a balrated or' brought together." In this movement, the plates 6 slideu pon the rod (1 and the branches. 7. In this manner the interval separating the eyepieces is regulated to the interval between the eyes.

If the handle'p be not acted upon and the milledknobj turned, the rack 71. is caused to advance or recede. This rack carries with the slides Z.

it the rod 0! and the branches f and, consequently, the eyepieces. In this movement the focusing'sleeves it slide in the rings'r in By this means focusing is effected.

As will be understood from the foregoing, the eyepieces are supported in front by the rod cl and the branches 7 which afford'efli cient guidance, seeing that the plates 6 have three points of support forming a triangle. At their base they are guided in a fixed manner, by the metal rings 1" with which they are directly in contact. In these conditions theeyepieces are incapable of play as in the arrangements hitherto adopted in which they were badly fixed. It should also be noted that the rings and the sleeves can be adjusted in an absolutely precise manner, metal to metal, and that the focusing does not here necessitate the cloth washers that have generally been employed for this purpose. Perfect .adjustment'is thus obtained without the possibility of binding.

Then again, binding can not occur owing to the manner in which the plates 12 are guided relatively to the carriage.

As the slides travel upon the metal base, 9,

- their displacement is-easy and well guided "apparatus the mechanism for adjusting the eyepieces, which constitutes merely a monoblock part which can be fitted in advance.

From these arrangements it follows that,

while simplifying the manufacture and rendering it more economical, the resultant apparatus is more precise and more certaln in its operation than any that has hitherto been constructed.

Finally the constitution and the'form of the focusing carriage enables the nose to be brought between the eyepieces and the eyes to be brought as close to the latter as desired.

The arrangements described above are given by way of example only, and the forms, dimensions and detail arrangements may vary, without thereby affecting the principle of the invention.

W hat I claim and desire to secure by Letters Patent of the United States is In a device for regulating the eyepieces of stereoscopes, the combination of a base plate, adjustable eye pieces, a post extending forwardly from the base plate and located between the eye pieces, a cross bar mounted upon the post and extending across the tops of the eye pieces, a forked member depending from the post and having its arms extending downwardly and outwardly and beneath the respective eye pieces, the space between the branches of the fork accommodating the nose of the user, a plate carried by each eye piece, said plate being provided at its top with a guide slidable upon the cross bar and at its bottom with another guide slidable upon the adjacent arm of the forked member, and means to move the eye pieces toward and away from one another.

The foregoing specification of my improvement in means for regulating the eyepieces of stereoscopes signed by me this 19th day of November 1912.

, JULES RICHARD.

Witnesses:

HANSON O. Come, RENE THIRIOT. 

